-4.9x^2+8.8x+2.4=0

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Solution for -4.9x^2+8.8x+2.4=0 equation:


Simplifying
-4.9x2 + 8.8x + 2.4 = 0

Reorder the terms:
2.4 + 8.8x + -4.9x2 = 0

Solving
2.4 + 8.8x + -4.9x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-4.9 the coefficient of the squared term: 

Divide each side by '-4.9'.
-0.4897959184 + -1.795918367x + x2 = 0

Move the constant term to the right:

Add '0.4897959184' to each side of the equation.
-0.4897959184 + -1.795918367x + 0.4897959184 + x2 = 0 + 0.4897959184

Reorder the terms:
-0.4897959184 + 0.4897959184 + -1.795918367x + x2 = 0 + 0.4897959184

Combine like terms: -0.4897959184 + 0.4897959184 = 0.0000000000
0.0000000000 + -1.795918367x + x2 = 0 + 0.4897959184
-1.795918367x + x2 = 0 + 0.4897959184

Combine like terms: 0 + 0.4897959184 = 0.4897959184
-1.795918367x + x2 = 0.4897959184

The x term is -1.795918367x.  Take half its coefficient (-0.8979591835).
Square it (0.8063306952) and add it to both sides.

Add '0.8063306952' to each side of the equation.
-1.795918367x + 0.8063306952 + x2 = 0.4897959184 + 0.8063306952

Reorder the terms:
0.8063306952 + -1.795918367x + x2 = 0.4897959184 + 0.8063306952

Combine like terms: 0.4897959184 + 0.8063306952 = 1.2961266136
0.8063306952 + -1.795918367x + x2 = 1.2961266136

Factor a perfect square on the left side:
(x + -0.8979591835)(x + -0.8979591835) = 1.2961266136

Calculate the square root of the right side: 1.138475566

Break this problem into two subproblems by setting 
(x + -0.8979591835) equal to 1.138475566 and -1.138475566.

Subproblem 1

x + -0.8979591835 = 1.138475566 Simplifying x + -0.8979591835 = 1.138475566 Reorder the terms: -0.8979591835 + x = 1.138475566 Solving -0.8979591835 + x = 1.138475566 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8979591835' to each side of the equation. -0.8979591835 + 0.8979591835 + x = 1.138475566 + 0.8979591835 Combine like terms: -0.8979591835 + 0.8979591835 = 0.0000000000 0.0000000000 + x = 1.138475566 + 0.8979591835 x = 1.138475566 + 0.8979591835 Combine like terms: 1.138475566 + 0.8979591835 = 2.0364347495 x = 2.0364347495 Simplifying x = 2.0364347495

Subproblem 2

x + -0.8979591835 = -1.138475566 Simplifying x + -0.8979591835 = -1.138475566 Reorder the terms: -0.8979591835 + x = -1.138475566 Solving -0.8979591835 + x = -1.138475566 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8979591835' to each side of the equation. -0.8979591835 + 0.8979591835 + x = -1.138475566 + 0.8979591835 Combine like terms: -0.8979591835 + 0.8979591835 = 0.0000000000 0.0000000000 + x = -1.138475566 + 0.8979591835 x = -1.138475566 + 0.8979591835 Combine like terms: -1.138475566 + 0.8979591835 = -0.2405163825 x = -0.2405163825 Simplifying x = -0.2405163825

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.0364347495, -0.2405163825}

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